Re: Multicast Routing Table Woes posted 04/15/2008
- Subject: Re: Multicast Routing Table Woes
- From: "Sadiq Yakasai" <sadiqtanko@xxxxxxxxx>
- Date: Tue, 15 Apr 2008 15:45:03 +0100
- Cc: "Matt Bentley" <mattdbentley@xxxxxxxxx>, ccielab@xxxxxxxxxxxxxx
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Just to add a little to what you keep an eye out for Matt, "debug ip
pim" would be another resourceful debug to run when you are running
PIM. The FLAGS. I cannot over emphasize the importance of
understanding all the Flags. It always points you to a right direction
when troubleshooting an mrouting issue.
As for the mroute table:
(*, 188.8.131.52), 00:22:48/stopped, RP 184.108.40.206, flags: SJCLF
Incoming interface: FastEthernet0/3, RPF nbr 220.127.116.11
Outgoing interface list:
FastEthernet0/2, Forward/Sparse, 00:19:41/00:03:16, H
This entry tells you this router knows about the Group (18.104.22.168). It
knows how to get to it (Incoming Interface, F0/3) and has someone
already joined this group downstream (Outgoing Interface List, F0/2).
(22.214.171.124, 126.96.36.199), 00:00:06/00:02:53, flags: LFT
Incoming interface: FastEthernet0/1, RPF nbr 0.0.0.0, Registering
Outgoing interface list:
FastEthernet0/2, Forward/Sparse, 00:00:06/00:02:53, H
This entry tells you someone has already pushed traffic for the group.
And the mcast traffic is from 188.8.131.52, coming in through F0/1 and
going towards someone who is listening for the group, having joined
the group ealier, via F0/2.
Anyways, keep doing it over and over and over again, and it will all
makes sense eventually. One thing at a time.